Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/prabhdeepsingh/claude-plugins/seonpx skills add PrabhdeepSingh/claude-plugins --skill seogit clone --depth 1 https://github.com/PrabhdeepSingh/claude-pluginsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/prabhdeepsingh/claude-plugins/seo)<a href="https://agentmods.dev/skills/prabhdeepsingh/claude-plugins/seo"><img src="https://agentmods.dev/badge/skills/prabhdeepsingh/claude-plugins/seo.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00114 | $0.04473 |
| Opus 5 | $0.00057 | $0.02237 |
| Sonnet 5 | $0.00023 | $0.00895 |
| Haiku 4.5 | $0.00011 | $0.00447 |
Grade A, and why
seo scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 182 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SEO — build it and write it so search rewards it
SEO is cheaper to bake in than to bolt on: a correct heading structure costs nothing at build time, while fixing it after launch takes a crawl, a redeploy, and weeks of re-indexing. And the writing carries the same property — a page that nails one search intent with extractable structure earns rankings and AI citations that no retrofit recovers. Every rule below optimizes for the crawler, the answer engine, and the human reader simultaneously; they almost always want the same thing. Sections 1–14 are the plumbing (templates, URLs, redirects, markup); sections 15–22 are the editorial layer (intent, structure, evidence). A template-only change uses the first half; a prose-only change the second; a new page both.
When to apply this
Any time you write or review something served as a web page or affecting how one is indexed: HTML templates, page components, routing, redirect rules, <head> metadata, sitemaps, robots.txt, structured data, CMS templates, URL patterns — and any prose destined for the web (posts, articles, guides, landing copy, press releases, changelogs, FAQs, docs, Markdown with frontmatter), even when nobody said "SEO".
Part A — the plumbing
1. HTML structure
- One
<h1>per URL, the main on-page heading inside<body>, tied to the page's focus keyword — never a site name, nav label, or logo. - Multiple
<h2>/<h3>are fine; heading tags are for content hierarchy, not navigation elements. - Avoid useless anchor text ("read more," "click here") — it tells neither the user nor the crawler what the destination is.
- Don't pile redundant links to the same URL. A repeat or two is normal (nav + body link); four links to one destination from one listing is clutter with no reliable added signal.
- Every page needs enough indexable body text in the initial HTML to establish what it's about, ideally above the fold. No minimum word count exists — "enough" is a quality judgment; a page whose HTML carries only a heading and boilerplate gives the crawler nothing to rank.
- Text shown in images must also exist as real HTML text — crawlers cannot read image-embedded text.
- Build navigation from real
<a href>links, not controls — crawlers may not treat buttons or JS click handlers as links.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 182 lines · 114 tokens per session scan A 3a05cea4814d
seo is a skill published in the GitHub repository PrabhdeepSingh/claude-plugins (3 stars, last pushed 4d ago), licensed MIT. It adds 114 tokens to every session and 4,473 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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